Material and methods: Choose harmless material to animal's cell and physical de-foaming methods.
材料与方法：采用对动物细胞无害的材料和物理方法去泡。
Methods: To improve teaching language, teaching material, teaching methods and so on.
方法：在教学语言、教材编写以及教学方法等方面进行改进。
Methods: To improve teaching language, teaching material, teaching methods and so on.
方法：在教学语言、教材编写以及教学方法等方面进行改进。
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